JP2006075876A - Fume recovering device in welding or fusion-cutting apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fume recovering device having an excellent effect in improving a work environment in a welding or a fusion-cutting apparatus. <P>SOLUTION: There are provided: an enclosure booth enclosing a welding or a fusion-cutting apparatus; a push hood having an air stream blowing mechanism; a pull hood having a suction and exhaustion mechanism set in a position opposite to the push hood; and an expandable flexible exhaust duct conveying the exhaust, discharged from the pull hood, to a dust collector. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a fume recovery device in a welding or fusing device for recovering fumes generated after welding or fusing.

  When welding or fusing a metal plate material, fume (including dust) is inevitably generated, and the work environment is polluted by ascending and diffusing extensively around the work area. The fumes at this time are harmful to the human body, and in particular, they diffuse while convection in the building by floating in the air. In addition, since the indoor work environment has been deteriorated over a wide range, the fume concentration increases while accumulating, and even another worker working in the same building is secondarily contaminated. Therefore, in recent years, various proposals have been made for these fume recovery means (Patent Document 1, Patent Document 2, Patent Document 3, Patent Document 4, and Patent Document 5). However, it is difficult to say that any of the conventionally proposed means has a sufficient working environment improvement effect. In particular, there is insufficient consideration when working while moving the apparatus such as a plasma fusing apparatus, and development of a fume recovery apparatus that further improves the working environment is desired.

Japanese Utility Model Publication No. 5-13673 Japanese Utility Model Publication No. 8-10459 JP-A-7-266052 Japanese Unexamined Patent Publication No. 2000-141075 JP 2000-254428 A

  An object of the present invention is to solve the above-described problems of the prior art, and in particular to provide a fume recovery device having a large work environment improvement effect in a welding or fusing device, and more particularly to move a cutting processing point. An object of the present invention is to provide a fume recovery device that has a large working environment improvement effect in a fusing device that operates while making it work.

The present invention includes, firstly, an enclosure booth surrounding a welding or fusing device, a push hood having an air flow blowing mechanism, a pull hood having a suction exhaust mechanism provided at a position facing the push hood, and conveying exhaust from the pull hood to a dust collector. It is a fume collection | recovery apparatus in the welding or fusing apparatus characterized by having the exhaust duct which carries out.
Secondly, the present invention is the above apparatus in which the push hood and the pull hood are positioned above the welded or blown metal plate.
Thirdly, the present invention is an apparatus in which the welding or fusing device operates while moving on the track, and the enclosure booth, the push hood, and the pull hood also move in conjunction with the movement.
Fourthly, the present invention is the above apparatus, wherein the exhaust duct is a telescopic flexible exhaust duct.
Fifth, the present invention is the above device, wherein the push hood is a push hood having a uniform air blowing mechanism.

  According to the present invention, fumes generated during welding or fusing work can be recovered extremely efficiently without adversely affecting the work, and the work environment can be improved, particularly in a fusing device that works while moving on a track. Even more prominent.

Hereinafter, the present invention will be described with reference to the drawings, taking a fusing device as an example.
FIG. 1 is a perspective view showing an example of a conventional fusing device. The conventional fusing device 1 is mainly used for fusing the metal plate material 3 while moving on the track 2 attached to the floor surface. A recovery device for the fumes generated at this time is provided on the lower surface of the metal plate to be cut. The sprayed fumes are sucked through a local exhaust hood (suction port) 4 provided on the side of the metal plate 3 and collected by a dust collector 5 mounted on the fusing device 1 main body. In this case, the fumes scattered in the lower part of the metal plate 3 are sucked in a considerable amount by the local exhaust hood 4 provided on the side, but the rising fumes generated on the upper surface of the metal plate 3 are provided with an exhaust countermeasure. The fact is not.

  FIG. 2 is a perspective view showing a preferred embodiment of the fume recovery device of the present invention corresponding to the fusing device shown in FIG. An enclosure booth 7 is attached to the fusing device 1, and a push hood (air blowing device) 8 and a pull hood (air suction part) 9 for creating an air flow that smoothly discharges fumes generated in the enclosure booth are added. A telescopic flexible exhaust duct 10 that can move in parallel on the track of the fusing device 1 is installed.

In the apparatus of the present invention, the fumes scattered to the lower part of the metal plate 3 are sucked by the local exhaust hood 4 as in the conventional apparatus (FIG. 1).
The enclosure booth 7 lays a supporting frame on the device so that at least the machined part of the device is accommodated so as to prevent the diffusion of fumes into the building outside the vicinity of the device. It is preferable to cover it.

  The push hood 8 is a device having an air flow blowing mechanism for conveying fumes generated in the enclosed booth to the pull hood 9. The push hood is preferably a device that blows out a uniform flow. Here, the uniform flow refers to an air flow in which the magnitude and direction of the flow velocity are substantially constant throughout the cross section when viewed in a cross section perpendicular to the flow. According to “Factory ventilation” published by the Air Conditioning and Sanitary Engineering Society, published in 1982, it is suggested that the variation in velocity distribution should be within ± 20% of the average value. Although there is no restriction | limiting in particular in the wind speed of the airflow which blows off from a push hood, Usually 1 m or more per second, especially 2-5 m are preferable. The push hood 7 is preferably arranged so as to blow an air flow horizontally or obliquely upward.

  The pull hood 9 is a device that sucks the air containing the fumes in the enclosure booth 7 at an air volume or more that is blown out by the push hood 8, and pushes the push hood 8 to a position opposite to the push hood 8, that is, a horizontal position on the opposite side or a diagonally upper position. The hood 7 is disposed with the suction port directed.

The telescopic flexible exhaust duct 10 is a telescopic exhaust duct pipe that is suspended on a rail installed above the enclosure booth 7 and conveys air containing fumes sucked from the pull hood 9 to the dust collector 11.
The dust collector 11 is a device that filters and collects fumes from the air conveyed via the pull hood 9 and the telescopic flexible exhaust duct 10.

  An example of operation using the apparatus shown in FIG. 2 which is a preferred embodiment of the present invention will be described.

The fume rising from the cutting section 6 of the plasma fusing device 1 that operates horizontally on the track 2 at around 1 m / second is not diffused into the building but is kept in the enclosed booth 7 and blown out from the push hood 8 at a speed of 2 m / second or more. The fume transported by air is transported to the pull hood 9. The air containing the transported fume passes through the pull hood 9, is suspended on a rail supported from the building column, and expands and contracts corresponding to the amount of movement of the fusing device 1 (for example, a diameter of 0). .3m) to collect with a dust collector 11 placed separately. The amount of exhaust air sucked from the pull hood 9 is about 50 m ³ per minute, and the amount of air blown from the push hood 7 is less than this, so that it does not leak from the gap opening of the enclosure booth 7 from the outside of the enclosure booth. Maintain air balance to maintain negative pressure.

Further, the diameter of the telescopic flexible duct 10 can be changed according to the scale of the fusing device 1. In the above example, if the diameter of the telescopic flexible duct 10 is, for example, 0.2 m and the clearance is about 20 m ³ , 0.4 m, the processing displacement is about 90 m ³ and 0.5 m is about 150 m ³ per minute. It is possible to obtain

  Thus, even when the fusing device 1 traces the machining point and moves back and forth on the track 2, most of the rising fumes generated during the cutting process are collected in the collection container in the dust collector 11, and the space in the conventional building is fume. However, after the above operation, the work space can be clearly seen, and the air environment of the work place is remarkably improved.

  As mentioned above, although this invention was demonstrated to the example of the fusing apparatus, this invention is applicable also to fusing apparatuses other than the welding apparatus which uses an arc welding apparatus etc., and a plasma fusing apparatus. In the case of using a fixed device, it is possible to make appropriate changes such as not necessarily using an extendable flexible exhaust duct as the exhaust duct.

The perspective view which shows an example of the conventional fusing device. The perspective view which shows the fusing apparatus provided with the fume collection | recovery apparatus of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Fusing apparatus 2 Track | truck 3 Metal plate material 4 Local waste hood 5 Dust collector 6 Cutting process part 7 Enclosure booth 8 Push hood 9 Pull hood 10 Elastic flexible exhaust duct 11 Dust collector

Claims (5)

  It has an enclosure booth that encloses a welding or fusing device, a push hood with an air flow blowing mechanism, a pull hood with a suction exhaust mechanism provided at a position facing the push hood, and an exhaust duct that conveys exhaust from the pull hood to a dust collector. A fume recovery device in a welding or fusing device.   The apparatus according to claim 1, wherein the push hood and the pull hood are positioned above the welded or blown metal plate.   The apparatus according to claim 1 or 2, wherein the welding or fusing device is a device that operates while moving on the track, and the enclosure booth, the push hood, and the pull hood move in conjunction with the movement.   The apparatus according to any one of claims 1 to 3, wherein the exhaust duct is a telescopic flexible exhaust duct.   The device according to any one of claims 1 to 4, wherein the push hood is a push hood having a uniform flow blowing mechanism for air.

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